Here are a few more frugal tips I came across that some find "extreme."
Don't throw away a plastic coated table cloth. Although it may not be good enough for your table, you can still use it for picnics, or drop cloths when painting, or cut it up and make place mats from it. Make bowl toppers by sewing a length of elastic around circles of various sizes cut from it and you have frugal, reusable covers for bowls or plates.
Rather than buying cheesecloth to tie spices in when cooking stews or other dishes, use a teaball. Even if you have to buy one, you'll save the cost many times over, since it should last you a lifetime.
When coating chicken or other meat to fry or bake, an old trick is to put the pieces in a paper sack along with the coating mix and shake. However, a vigorous shaking can rip the bottom out of today's wimpy paper sacks. For a frugal substitute, use an empty (washed or not) chip bag. They're much sturdier, and when you're through, you can roll it tightly closed and tape or tie and freeze the remainder for the next time.